"Damn it! I accidently deleted my contact list by pressing some wrong button. How to recover all the deleted iPhone contacts without backup?"
"iOS 7 deleted my contacts after update. I have no backup files for my iPhone 5. Help!"
"I lost my iPhone contacts and other data after factory settings restore. I forgot to backup my device. Any help?"
"After jailbreak, all the important contacts are erased. No iTunes backup or iCloud backup. Help."
As those scenarios show, you could lose iPhone contacts due to accidental deletion, iOS 7.1/7 update, original factory settings restore, jailbreak, firmware corruption, damage, etc. However, don't feel down even though you have no backup files, because you can easily recover contacts directly from iPhone without backup.
If you find iPhone lost contacts and you have no backup (like the iTunes or iCloud backup), you'd better use your iPhone as less as possible to lessen the chance of putting new files to overwrite the space once the contacts occupied. Any operation on the device may make the deleted contacts unrecoverable. Then you should use iPhone Data Recovery to directly restore deleted iPhone contacts without backup.
This iPhone Data Recovery software is widely used by iOS users on Windows 8.1/8/7/XP/Vista computers. It can help to detect your iPhone 5S/5C/5/4S/4, extract all lost data including contacts from iPhone, and then recover them in readable formats, such as the vCard/VCF, .txt, .xls, .xml. No backup files are need.
If you want to recover lost iPhone contacts without backup on Mac OS X 10.9/10.8/10.7/10.6, you can go to iPhone Data Recovery for Mac.
Download and install iPhone Data Recovery on your PC. Here is the guide on how to recover iPhone contacts without iTunes, iCloud or other backup files.
After you undelete iPhone contacts with iPhone Data Recovery, you will notice that other data like messages, photos, notes deleted or lost can also be retrieved. Select any wanted files to recover as you like.
Note: iPhone Data Recovery can also help to recover deleted iPhone contacts from iTunes and iCloud backup.
Since contacts are important for us to keep in touch with others, you'd better build up the habit of backing up iPhone contacts regularly. This can help to prevent data loss forever even though you deleted them on your device and put newer files to overwrite them.
For more details, you can refer to the article of how to backup iPhone contacts to PC or Mac.